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Flat Roofing • Synthetic Rubber • Commercial

EPDM RUBBER /
ROOFING.

Ethylene propylene diene monomer — a synthetic rubber single-ply membrane with a 50+ year track record protecting commercial and industrial buildings worldwide. Engineered to handle extreme temperatures from −40°C to +50°C without cracking, splitting, or losing flexibility.

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Proven Track Record
−40 to +50°C
Temperature Range
Class A
Fire Rating
Low
Maintenance
What Is EPDM

Synthetic Rubber.
Single-Ply. Proven.

EPDM (ethylene propylene diene monomer) is a high-density synthetic rubber membrane that has been the backbone of commercial flat roofing for over five decades. Available in black and white, EPDM sheets are manufactured in wide rolls that cover large roof areas with minimal seams — reducing potential leak points.

Trusted on millions of square feet of roofing worldwide, EPDM delivers exceptional resistance to ultraviolet radiation, ozone exposure, and extreme weather. Unlike many roofing materials that become brittle over time, EPDM retains its elasticity and waterproofing performance year after year, even under the most demanding conditions.

Why Roofers Trust EPDM
  • Installed with Firestone EPDM — the industry standard
  • Outstanding UV and ozone resistance — no chalking or cracking
  • Retains flexibility from −40°C to +50°C
  • Wide sheet widths minimize seam count
  • Can be fully adhered, mechanically fastened, or ballasted
  • Proven 50+ year service life when properly installed
System Composition

Built in
layers.

Scroll to assemble a Premium EPDM system — full-width rubber sheets bonded to an engineered base, sealed for 50-year service.

  1. 01
    Steel DeckCorrugated galvanized B-deck, fastened to spec
  2. 02
    Vapour BarrierSelf-adhered sheets sealed to the deck, 76 mm laps
  3. 03
    Polyiso InsulationTwo layers, joints offset min 150 mm — no thermal shortcut
  4. 04
    Cover BoardHD board screwed off through the stack; a reinforced strip anchors every edge
  5. 05
    EPDM Membrane60-mil rubber in 3 m sheets, fully adhered — one primed + taped splice
  6. 06
    Edge Metal & Strip-InFlange nailed 100 mm o.c. over the membrane, sealed under taped flashing
The Material

The Rubber, Up Close.

EPDM is a single-ply synthetic rubber — one continuous sheet, its seams bonded with primer and tape. It stays flexible from −45°C to +60°C, which is why it outlasts almost everything else on a flat roof.

  • 45–60 milmembrane thickness
  • 50+ yrservice life
  • −45°Cstays flexible to
  • Single-Plyadhered or ballasted

Drag the sample to inspect

Advantages

Why Choose EPDM.

UV & Ozone Resistance
EPDM naturally resists ultraviolet radiation and ozone degradation without requiring additional coatings or surface treatments. It will not chalk, crack, or become brittle under prolonged sun exposure.
Extreme Temperature Flexibility
Maintains full elasticity from −40°C to +50°C. The rubber compound absorbs thermal expansion and contraction without stress cracking — ideal for the Okanagan’s dramatic temperature swings.
Low Maintenance
Once installed, EPDM requires minimal upkeep. Periodic inspections and basic debris removal are typically all that’s needed to maintain optimal performance for decades.
Long Lifespan
With proper installation and care, EPDM roofing systems routinely last 25–30+ years. Many original installations from the 1970s remain in service today with no significant degradation.
Cost-Effective
EPDM offers one of the lowest lifecycle costs of any flat roofing system. The combination of affordable material, straightforward installation, and minimal maintenance delivers exceptional long-term value.
Environmentally Friendly
EPDM is fully recyclable at end of life. Its long service life reduces material consumption, and the manufacturing process has a lower environmental footprint compared to many alternatives.
Applications

Ideal For.

EPDM excels on low-slope and flat roof applications where long-term, low-maintenance waterproofing is the priority. Its versatility and proven performance make it the go-to choice for a wide range of building types.

Local Performance

EPDM in the Okanagan.

The Okanagan Valley presents unique roofing challenges. EPDM’s synthetic rubber composition makes it uniquely qualified to handle every one of them.

❄
Freeze-Thaw Resilience
Okanagan winters bring repeated freeze-thaw cycles that crack rigid materials. EPDM’s rubber flexibility absorbs expansion and contraction without damage, maintaining its seal through every temperature shift.
☀
UV Resistance
With 2,000+ hours of sunshine per year, Kelowna’s intense UV exposure degrades many roofing materials prematurely. EPDM is inherently UV-stable, resisting breakdown without topcoats or reflective layers.
🌡
Temperature Swings
Summer highs above +40°C and winter lows below −25°C put extreme thermal stress on roofing. EPDM’s rated range of −40°C to +50°C provides comfortable margin in every season.
Common Questions

EPDM FAQ.

A properly installed EPDM roof typically lasts 25–30+ years. Many EPDM installations from the 1970s and 1980s are still performing well today. Lifespan depends on membrane thickness, installation quality, and regular maintenance.
EPDM is a thermoset rubber membrane bonded with adhesive or tape, while TPO is a thermoplastic membrane with heat-welded seams. EPDM has a longer track record and excels in extreme cold, while TPO offers better energy efficiency with its reflective white surface. Both are excellent choices — the best fit depends on your building’s specific needs.
Yes. EPDM’s lightweight profile and flexible installation methods make it an excellent re-roofing option. In many cases, it can be installed directly over the existing roof substrate after proper preparation, eliminating costly tear-off and disposal.
EPDM can be installed using three primary methods: fully adhered (bonded to the substrate with adhesive), mechanically fastened (secured with plates and fasteners along the seams), or ballasted (held in place with river rock or pavers). The best method depends on roof type, wind exposure, and building use.
Absolutely. EPDM is rated for temperatures from −40°C to +50°C, well beyond anything the Okanagan experiences. Its rubber flexibility handles freeze-thaw cycling, its UV resistance withstands Kelowna’s intense sunshine, and its proven durability means it performs reliably through decades of seasonal extremes.
Get Started

Ready for EPDM?

Whether you’re planning a new commercial roof, replacing an aging system, or exploring your flat roofing options — our team is ready to help you determine if EPDM is the right fit for your building.

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